About Stian : Black fungus especially in Hotels & Hospitals laundries we can able to find, It will develop because of properly if not dried that wetting area fungus will form, It's very dangerous to human health, Better you should identify early and take preventive actions Mylab Solutions: A: Take Acetic Acid 50% B: ChloreX Mylab Mylab Treatment : Step -1 Take solution " A" in a bucket soak fungus stained clothes 40 min Step -2 Take solution "B" in another bucket soak same clothe for 20 min Note: Do not mix both chemicals in same bucket and wear gloves & mask Results: After step 2 black stain will be clear We are practically removed in our lab any clarifications please contact me Regards Nagaraj.M C.E.O Mylab Biotech Chemicals 9392561829